Cell fitted with thin beryllium windows for x-ray absorption under pressures up to 14 MPa and temperatures up to 700 K

A stainless-steel reactor cell is described. Its purpose is to permit in situ x-ray absorption spectroscopy study of three-phase catalytic reactions at temperatures up to 700 K and pressures up to 14 MPa. The x-ray beam enters and leaves the cell through thin (0.051 cm) beryllium windows. The design of the cell allows for high-temperature operation while keeping the beryllium windows at room temperature. The x-ray beam passes through a catalyst wafer wetted by a liquid reactant film trickling down the catalyst while a gas-phase reactant dissolves in the liquid and reacts with the latter on the catalytic surface.